The Medium Armor skill lets one move and defend while wearing durable but flexible armors like chain, scale, bonemold, and Orcish armor. To use any style of armor effectively, the wearer must be trained, conditioned, and skilled in its use.

There is no Master Trainer for Medium Armor. It was supposed to be Cinia Urtius, who would appear at the docks at Tel Fyr. Unfortunately, due to a glitch, she never does appear, so she is unavailable for training.

Of the three armor skills, Medium Armor arguably has the most drawbacks. First of all, the variety of medium armor is much smaller than that of light or heavy armor. Secondly, the highest-rated medium armor in the unexpanded game is still inferior to the highest rated light and heavy armors in terms of defense rating. Your highest possible armor rating when wearing the best medium armor available at maxed skill is 145, vs. 168 for light armor or 266 for heavy. Also, the best-rated medium armor available (Indoril armor) is lacking greaves, so if you want the best you can get, you'll have to use Orcish Greaves, which don't match. And it's also worth noting that talking to an Ordinator while wearing the Indoril Helmet or Cuirass will cause them to put you on their death-list for the rest of your life. And on top of all that, the skill lacks a Master Trainer. Most of these issues are mitigated by the medium armor found in the Tribunal and Bloodmoon expansions, however.

On the positive side, it does provide a balance of protection and speed which will suit some character types and play styles, particularly during early and mid levels when a character wouldn't have easy access to the best light or heavy armor.

The best sets of medium armor (including those found in the Tribunal expansion) are much lighter than the best set of heavy armor while still giving stronger protection than the best light armor types. The best sets of medium armor are about as heavy as the worst set of heavy armor.

Ebony Mail ties two heavy armor artifacts for the highest armor rating available from an item. It also has extremely powerful constant effect enchantments, including a 50 point shield.